3D Flower-Like FeWO/CeO Hierarchical Architectures on rGO for Durable and High-Performance Microalgae Biophotovoltaic Fuel Cells.

A facile chemical reduction approach is adopted for the synthesis of iron tungstate (FeWO)/ceria (CeO)-decorated reduced graphene oxide (rGO) nanocomposite. Surface morphological studies of rGO/FeWO/CeO composite reveal the formation of hierarchical FeWO flower-like microstructures on rGO sheets, in which the CeO nanoparticles are decorated over the FeWO microstructures. The distinct anodic peaks observed for the cyclic voltammograms of studied electrodes under light/dark regimes validate the electroactive proteins present in the microalgae. With the cumulative endeavors of three-dimensional FeWO microstructures, phase effect between rGO sheet and FeWO/CeO, highly exposed surface area, and light harvesting property of CeO nanoparticles, the relevant rGO/FeWO/CeO nanocomposite demonstrates high power and stable biophotovoltaic energy generation compared with those of previous reports. Thus, these findings construct a distinct horizon to tailor a ternary nanocomposite with high electrochemical activity for the construction of cost-efficient and environmentally benign fuel cells.